JP5658014B2 - Cutting blade cover open / close structure - Google Patents

Description

  The present invention relates to a cutting blade cover opening / closing structure, and more particularly, a configuration in which the cutting blade cover can be moved in the horizontal direction so that it can be easily opened during maintenance. The present invention relates to a technology capable of forming a road.

Generally, a riding mower includes a traveling unit driven by a prime mover and a rotary blade, and is configured to cut grass while an operator performs a boarding operation.
Riding lawn mowers rotate the rotary blade provided at the bottom of the vehicle body at high speed to mow the grass, and there is a risk of jumping pebbles etc. during work, and the tip of the blade is exposed from the bottom of the vehicle. is there.
Therefore, the techniques of Patent Documents 1 and 2 have been proposed as techniques for preventing pebbles and the like from popping out during the operation of the riding mower and exposing the cutting blade.
JP 2005-176777 A JP 2003-164 211 A

In the techniques of Patent Documents 1 and 2, a cutting blade cover is arranged around the cutting device to prevent the cutting blade from being exposed and the pebbles from popping out. There was a problem of difficulty.
The present invention has been made to solve the conventional problems, and the object of the present invention is to have a configuration in which the cutting blade cover can be moved in the horizontal direction and can be easily opened during maintenance. An object of the present invention is to provide an open / close structure for a cutting blade cover that can form a discharge path for grass cut by adjusting the position of the blade cover.

In the open / close structure of the cutting blade cover according to claim 1, the traveling machine body provided with the wheels, the cutting blade disposed and rotated below the traveling machine body, and disposed on the outer periphery of the cutting blade to prevent pebbles and the like from jumping out. An open / close structure of a cutting blade cover applied to a mower provided with a cover, wherein the cover is moved horizontally to open and close the outer periphery of the cutting blade, and the cover is provided on both left and right sides of the machine body. Arranged, a horizontal rotation mechanism is set in front of each side cover, and the horizontal rotation mechanism is used as a fulcrum to rotate in the direction in which the rear of the cover approaches or separates from the aircraft,
Locking means for locking to the airframe is arranged behind each cover, and the lock means has a function of locking the back of the cover at a position away from the airframe if necessary .

The open / close structure of the cutting blade cover according to claim 2 , wherein the cover has a vertical rotation mechanism that opens upward and opens the outer periphery of the cutting blade in the open / close structure of the cutting blade cover according to claim 1. Features.

The opening / closing structure of the cutting blade cover according to claim 3 is the opening / closing structure of the cutting blade cover according to claim 2, wherein the locking means regulates the rotation position of the horizontal rotation mechanism and the rotation of the vertical rotation mechanism. It has a function as a dynamic support shaft.

By adopting the above configuration, the present invention has the following effects.
In the open / close structure of the cutting blade cover according to the first aspect, since the cover for preventing the pebbles and the like from jumping out is moved in the horizontal direction, the outer periphery of the side portion of the cutting blade can be largely opened. Therefore, the ease of maintenance of the cutting blade is realized.
Also, the covers are arranged on the left and right sides of the machine body, and a horizontal rotation mechanism is set in front of each cover, so the rear of the cover rotates in the direction approaching or separating from the machine body using the horizontal rotation mechanism as a fulcrum. To do.
Locking means for locking to the fuselage is arranged behind each cover, and the lock means has a function of locking the back of the cover at a position away from the fuselage as necessary. The rear can be opened to ensure a large grass discharge space.

The open / close structure of the cutting blade cover according to claim 2 has a vertical rotation mechanism that opens the cover upward to open the outer periphery of the cutting blade, and therefore opens the cover in the vertical direction in addition to the horizontal direction. The outer periphery of the cutting blade can be opened. For this reason, it is possible to set various cover opening modes according to the maintenance site / method, the grass status / type, and the like.

In the open / close structure of the cutting blade cover according to claim 3, the locking means for locking the rear of the cover to the machine body functions as a function for regulating the rotation position of the horizontal rotation mechanism, and as a rotation support shaft of the vertical rotation mechanism. Therefore, if one point is locked, the horizontal movement of the cover can be fixed while being supported so as to be rotatable in the vertical direction.

  The best mode for realizing the open / close structure of the cutting blade cover will be described below with reference to the drawings.

  As shown in FIGS. 1 to 5, the riding mower to which the cutting blade cover opening / closing structure of the present invention is applied includes a traveling machine body having front and rear wheels 1, 2, a driver's seat 3 installed at the center of the traveling machine body, and a traveling machine body. An engine 4 mounted on the rear side of the vehicle and a mowing device 5 disposed on the lower side of the vehicle.

  The side panel is provided with a sub-shift lever for a transmission shift operation (travel speed shift of the traveling machine body), an up / down lift lever 6 for operating a vertical slide (lift) of the mowing device, an HST lever for adjusting a travel speed, and the like. In addition, a travel pedal 7 and a brake pedal are provided to be freely operated from the floor of the traveling machine body.

An operator (operator) sits in the driver's seat 3, operates the up / down lift lever 6 to lower the mowing device 5 to a height that can be cut, operates the cutting blade clutch lever, rotates the cutting blade, The travel speed can be selected and set, and the travel machine body is traveled by depressing the travel pedal 7, and the steering operation is performed by the handle 8, so that the mowing device 5 can perform the mowing work while the travel body is traveling.
The mowing device 5 is a rotary cutter that transmits a driving force from the engine to rotationally drive the cutting blade 9.

The reaping device 5 includes an upper cover 10 disposed on the bottom of the machine body, and side covers 11 attached to both sides of the upper cover 10, and pivotally supports a portion surrounded by these covers. A cutting blade 9 is disposed.
An insertion hole 13 of the drive shaft 12 is formed in the center of the upper cover, a stay 14 is connected to the drive shaft 12 inserted perpendicularly to the insertion hole 13, and a cutting blade 9 is attached to the tip of the stay.
The stay 14 is a long plate-like horizontal plate material, the center of which is pivotally supported by the drive shaft 12, the cutting blade 9 is provided at the tip, the blade 14 is rotated horizontally with the rotation of the drive shaft 12, and the grass is removed by the cutting blade at the tip. reap.

The upper cover 10 is a plate-like member that protects the upper side of the cutting blade, and is disposed horizontally below the traveling machine body.
When the elevating lever 6 is operated, the upper cover 10 suspended from the main body frame gets on and off, and the drive shaft 12, the stay 14, the cutting blade 9 and the side cover 11 are also raised and lowered in conjunction therewith.

The side cover 11 is disposed on the left and right side surfaces of the traveling machine body, and is sandwiched between the front and rear wheels 1 and 2 of the vehicle so as to close the gap with the ground. That is, the side cover 11 closes the rotating outer periphery of the cutting blade 9 to prevent the cutting blade 9 from being exposed and the pebbles from jumping out.
The left and right side covers 11 have an upper surface 11a that extends in a horizontal direction continuously to the upper cover 10 and side surfaces 11b that are bent from the top of the upper surface and hang down, and are connected to the upper cover 10 (airframe) via a connecting portion 15. Has been.
The upper cover 10 and the upper surface 11a of the side cover are disposed on substantially the same horizontal line, and the upper cover 10 and the side cover 11 are connected to block the upper and left and right side surfaces of the cutting blade outer periphery. The side cover 11 closes the space between the front wheel 1 and the rear wheel 2 from the ground, and the side cover 11 can be moved and opened in the horizontal direction to open and close the cutting blade outer periphery.
The outer edge of the side cover upper surface 11a is curved in an arc shape along the rotation locus of the cutting blade, and the side surface 11b is bent downward from the curved line. Since the side surface 11b hangs down, the extension line on the outer periphery of the cutting blade is closed vertically, and pebbles and the like that are jumped off the cutting blade collide with the side surface 11b and are prevented from jumping out.
A rubber cloth 16 is disposed and sealed at a connection portion between the upper cover 10 and the side cover 11, and a rubber cloth 17 extends from the upper cover 10 behind the side cover 11. These rubber cloths 16 and 17 block the connection part and prevent the dust and the like from flying up.

The connecting portion 15 is a part constituting a horizontal turning mechanism, and is a mechanism that supports the side cover 11 so as to be turnable in the horizontal direction with respect to the upper cover 10 of the traveling machine body. With the horizontal rotation mechanism as a fulcrum, the rear of the side cover 11 rotates in a direction approaching or separating from the airframe.
Bolts 18 are vertically inserted into the front left and right ends of the upper cover 10 (portions located immediately after the inside of the front wheels), and a connecting portion 15 is rotatably attached to the bolts 18 in the horizontal direction. The side cover 11 is connected to the attached connecting portion 15. The upper surface of the connecting portion 15 is formed in a plate shape, and ribs 19 are disposed on the plate surface to be reinforced.
The connecting portion 15 and the side cover 11 are integrally rotated in the horizontal direction. When the connecting portion 15 and the side cover 11 are rotated with the bolt 18 as a fulcrum, the rear of the side cover 11 is opened in a direction away from the airframe. It will be.

A vertical rotation mechanism 20 is connected to the connecting portion 15.
The vertical rotation mechanism 20 is a mechanism that supports the side cover 11 so as to be tiltable upward. The vertical rotation mechanism 20 includes a shaft support portion 21 that supports the side cover 11 so as to be rotatable up and down with respect to the connecting portion 15, and a locking pin 22 fixed to the side cover 11. It becomes a structure latched in the groove | channel 23 (refer FIG. 4) by the connection part side.
The plate rear portion on the upper surface of the connecting portion 15 rises in the vertical direction to form a standing portion 24, and a shaft fixed to the side cover side is inserted into a hole in the standing surface of the standing portion 24, and the shaft supporting portion 21 is a fulcrum. As shown, the side cover 11 is rotatable up and down.

The locking pin 22 extends outward from a portion locked in the groove 23, and a spring 25 is connected to one end thereof. By manually operating one end of the extended portion of the locking pin 22 and removing the locking pin 22 from the groove 23 against the spring 25, the side cover 11 can move up and down with the shaft support 21 as a fulcrum, When the pin is released along the elasticity of the spring 25, the locking pin 22 is locked to the groove 23 and the side cover 11 is held at a specific height position.
The connecting portion 15 and the side cover 11 are connected by a shaft support portion 21, but a connecting portion with a connecting portion 15 (not shown) is set at the tip of the side cover 11, and the shaft supporting portion 21 and the connecting portion are connected to each other. Together, the side cover 11 is held horizontally.

A groove 23 of the locking pin 22 is formed on the vertical side of the upright portion 24, and the locking pin 22 fixed to the side cover 11 is locked in the groove 23.
The groove 23 is formed with concavities and convexities in the vertical direction, and the side cover 11 is rotated upward with the shaft support portion 21 as a fulcrum, and the lock pin 22 is locked in a specific recess, thereby The side cover 11 is opened upward at the locked position.

The locking means includes a bracket 26 protruding from the upper cover to the left and right sides of the vehicle, and an insertion pin 27 attached to the side cover 11.
The bracket 26 is fixed to the rear portion of the upper cover 10 (airframe), and the tip of the bracket 26 projects outward from the upper cover in the vehicle width direction.
The bracket 26 is formed with a hole 28 into which the insertion pin 27 is loosely fitted at predetermined intervals in the direction of the vehicle width (three places in the present embodiment). The back of the side cover 11 is fixed by inserting and locking the head of the insertion pin 27 into the hole 28.

The locking means has a function of locking the rear side of the side cover 11 at a position away from the airframe as necessary. That is, when the insertion pin 27 is inserted and locked in the hole 28 closest to the fuselage, the side cover 11 is brought into close contact with the fuselage, and when the insertion pin 27 is locked in a hole sequentially away from the position close to the fuselage, Thus, the side cover 11 is separated from the machine body, and a space is formed between the side cover 11 and the cutting blade 9.
By forming a space between the cutting blade 9 and the side cover 11, a large grass discharge space or discharge path is ensured on the outer periphery of the cutting blade 9.
The locking position of the locking pin 27 with respect to the bracket 26 is appropriately selected according to the situation at the site.

The insertion pin 27 is attached to the rear of the side cover 11, and is set so that the head of the insertion pin 27 can be inserted into the hole 28 of the bracket at a position where the side cover 11 is brought close to the airframe.
The insertion pin 27 is a columnar member disposed horizontally in the front-rear direction of the vehicle, and a spring 29 is disposed at the base so that the head is biased in the protruding direction (rear of the vehicle). The head can be moved back and forth by operating the lever 30, and when the head is retracted, the head is removed from the hole 28 and the lock is released. In the unlocked state, the side cover 11 can be rotated in the horizontal direction with the bolt 18 as a fulcrum.

The vertical rotation mechanism is configured to rotate along a line connecting the insertion pin 27 and the shaft support 21.
When the cylindrical head portion of the insertion pin 27 is loosely fitted into the circular hole 28, the horizontal rotation of the side cover 11 is restricted (fixed), but the insertion pin 27 extends along the inner periphery of the hole 28. Since it slides, the insertion pin 27 is supported by the bracket 26 so as to be rotatable in the vertical direction. Therefore, by locking the insertion pin 27, the locking means has a function of regulating the rotation position of the horizontal rotation mechanism of the side cover 11 and a function as a rotation support shaft of the vertical rotation mechanism. become.
That is, the side cover 11 can be pivotably supported in the vertical direction only by locking the insertion pin 27 in the hole 28 of the bracket, and at the same time, the horizontal movement of the side cover 11 can be fixed. Therefore, the side cover 11 can be opened upward with the insertion pin 27 locked to the bracket 26.

Next, the operation of the present invention will be described.
In the mowing work, the operator sits in the driver's seat 3 and operates the up / down lift lever 6 to lower the mowing device 5 to a height that can be cut and performs the mowing work while the traveling machine body is running.
Since the rotary cutter rotates at a high speed, pebbles and the like may jump off the vehicle, but the side cover 11 prevents the pebbles from jumping out. Further, exposure of the tip portion of the cutting blade 9 is covered with the side cover 11 to prevent danger.
At the site where grass is overgrown, the rear 11 of the side cover is opened to ensure a wide space with the outer periphery of the cutting blade. Since the insertion pin 27 has a function of regulating the rotation position of the horizontal rotation mechanism of the side cover 11 and a function as a rotation support shaft of the vertical rotation mechanism, the insertion pin 27 is engaged with the bracket 26. The side cover 11 can be opened upward in a stopped state. By opening the side cover 11, even if a large amount of grass is cut off, it is discharged smoothly without causing grass clogging in the apparatus.
When the cutting blade 9 needs to be replaced, the side cover 11 is opened widely in the horizontal direction for maintenance.

Although the embodiments have been described above, the specific configuration of the present invention is not limited to the above-described embodiments, and design changes and the like within a scope not departing from the gist of the invention are included in the present invention.
For example, in the above-described embodiment, the side cover is configured to rotate and open, but a configuration in which the side cover is slid and translated is also included in the present invention.

It is a perspective view which shows the state which opened the right side cover. It is a top view which shows the state which opened the left side cover. It is explanatory drawing which shows the latching state of a side part cover. It is a perspective view of a connection part. It is an enlarged view which shows the latching state of the latching pin with respect to a connection part.

DESCRIPTION OF SYMBOLS 1 Front wheel 2 Rear wheel 3 Driver's seat 4 Engine 5 Cutting device 6 Vertical raising / lowering lever 7 Traveling pedal 8 Handle 9 Cutting blade 10 Upper cover 11 Side cover 11a Upper surface 11b Side surface 12 Drive shaft 13 Insertion hole 14 Stay 15 Connecting part 16 Rubber cloth 17 Rubber cloth 18 Bolt 19 Rib 20 Vertical rotation mechanism 21 Shaft support part 22 Locking pin 23 Groove 24 Standing part 25 Spring 26 Bracket 27 Insertion pin 28 Hole 29 Spring 30 Lever

Claims (3)

A cutting blade cover applied to a mower having a traveling machine body having wheels, a cutting blade disposed below the traveling machine body and rotating, and a cover disposed on the outer periphery of the cutting blade to prevent pebbles and the like from jumping out. The opening and closing structure of
The cover is moved horizontally to open and close the outer periphery of the cutting blade ,
The covers are arranged on the left and right sides of the airframe, and a horizontal rotation mechanism is set in front of each side cover, and the rear of the cover rotates in a direction approaching or separating from the airframe with the horizontal rotation mechanism as a fulcrum. With the configuration,
Locking means for locking to the airframe is disposed behind each cover, and the locking means has a function of locking the back of the cover at a position away from the airframe as necessary. Cover opening / closing structure. The open / close structure of the cutting blade cover according to claim 1, wherein the cover has a vertical rotation mechanism that opens upward to open the outer periphery of the cutting blade . 3. The open / close structure of a cutting blade cover according to claim 2, wherein the locking means has a function of regulating a pivot position of the horizontal pivot mechanism and a function as a pivot of the vertical pivot mechanism .

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